Datanode Internals

This section documents the internal workings of the Datanode.

📄️ Disk Layout

TODO: File a subtask under HDDS-9862 and complete this page or section.

📄️ Datanode Container Schema v3

In Ozone, user data are separated into blocks and stored in HDDS Containers. Containers are the fundamental replication unit of Ozone/HDDS. Each Container has its metadata and data. Data are saved as files on disk. Metadata is saved in RocksDB.

📄️ In-Memory Storage

TODO: File a subtask under HDDS-9862 and complete this page or section.

📄️ Startup Sequence

TODO: File a subtask under HDDS-9862 and complete this page or section.

📄️ Write Request Flow

TODO: File a subtask under HDDS-9862 and complete this page or section.

📄️ Read Request Flow

TODO: File a subtask under HDDS-9862 and complete this page or section.